Catholic schools are top-seeded in several divisions of the CIF-Southern Section basketball playoffs that opened this week. Following are first round games involving Catholic schools from Los Angeles and Orange. (Results will be posted as soon as possible online.)

BOYS

Open Division: Cantwell-Sacred Heart (16) vs. Mater Dei (1); Chaminade (9) vs. Mayfair (8); Serra (13) vs. Corona Centennial (4); St. John Bosco (14) vs. Loyola (3); Bishop Montgomery (10) vs. Chino Hills (7); Cathedral (15) vs. Etiwanda (2).

1AA: Damien (4) vs. Diamond Bar.

1A: Alemany (2) vs. Alhambra

3AA: Santa Margarita (1) vs. San Juan Hills; Servite (10) vs. Gabrielino.

3A: Bishop Amat (8) vs. Hawthorne; St. Francis (2) vs. Yucca Valley.

4AA: St. Genevieve vs. Buckley; Paraclete vs. Nordoff; J. Serra (5) vs. Twentynine Palms; Crespi (4) vs. Fairmont Prep; La Salle vs. Pacific Hills; Notre Dame/Sherman Oaks vs. Flintridge Prep.

4A: St. Joseph/Santa Maria (16) vs. Carpinteria; St. Anthony (5) vs. Malibu; St. Bernard (13) vs. Ontario Christian; Salesian (11) vs. Providence;  St. Monica (10) vs. Crean Lutheran; St. Bonaventure (15) vs. Santa Ynez; Verbum Dei vs. Price.

5AA: Santa Clara (7) vs. Temecula Prep; Bishop Diego (4) vs. Santa Rosa Academy.

6: St. Monica Academy vs. Liberty Christia

GIRLS

Open Division: Mater Dei (1) bye; Alemany (8) vs. Sierra Canyon (9); Serra (5) vs. Keppel (12); Chaminade (6) vs. Lynwood (11).

1AA: Bishop Amat (5) vs. Pacifica/Oxnard.

3A: St. Joseph/Lakewood (8) vs. St. Lucy’s; Azusa vs. Santa Margarita (2).

4AA: JSerra (1) vs. Muir; CAMS vs. Notre Dame Academy (16); Twentynine Palms (9) vs. Flintridge Sacred Heart; Workman vs. La Salle (8); Whitney (5) vs. Louisville; Templeton (12) vs. Marymount; St. Paul (13) vs. Carpinteria; Mesa Grande vs. Rosary (4); Rolling Hills vs. Notre Dame/Sherman Oaks (14); Morro Bay vs. St. Bernard (11); St. Anthony (10) vs. Immaculate Heart; Paraclete vs. El Segundo (15); Bishop Montgomery (2), bye.

4A: La Reina vs. Brentwood (1); Cantwell Sacred Heart (4) vs. Desert Christian; St. Joseph/Santa Maria (4) vs. Rio Hondo; Bishop Conaty-Loretto vs. St. Bonaventure (11); St. Genevieve vs. St. Monica (6); Providence (7) vs. Fillmore; Fairmont Prep (2) vs. Mayfield.

5AA: San Gabriel Mission vs. Buckley (8); Holy Family vs. Chadwick (12); Santa Clara (3) vs. Sage Hill; Bishop Diego (7) vs. Calvary Chapel.

5A: St. Pius-St. Matthias (5) vs. Lone Pine.

6: St. Monica Academy (12) vs. Cuyama Valley.